Hairbrush



FIG. 1 is a front elevational view of a hairbrush showing my new design;

FIG. 2 is a side view, taken from the left side of FIG. 1;

FIG. 3 is a side view, taken from the right side of FIG. 1;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The dotted lines showing a power cord in FIGS. 1-5 are for illustrative purposes only and forms no part of my claimed design. 

The ornamental design for a hairbrush, as shown and described. 